A situation in which, through no fault of the follow (typically male), one has found themselves walking behind another (typically female), with the follwed oblivious to the follower.
This commonly occurs on city streets, college campuses/ towns, or parking lots. In the situation of the follower, it becomes necessary to make oneself known before discovered.

Following without the followed knowing becomes exponentially risky/awkward/sketchy as hours grow late, especially when discovered.
Do's